Manufacture of molded and vulcanized rubber-cork articles



20'1ots. r v i Once-the mass has become perfectly homo suitable moldsand vulcanlze -.tainedinsaid niolds. Y

10 'india-rubber, powdered cork and emery.

Patented Och 23, 1928.]

/ BAOUL emom-snnsox, or mm,

\ ma a or aroma? nminmconx' nnenm."

Ko Drawing. Application filed August n,

()ur invention relates to the manufacture of molded and vulcanizedrubber "articles containing cork, and it applies, especially, to themaking of covers and inner tubes for 5 pneumatic tires and of solidtires, whether honeycombed or not.

According to our invention,- the materialfroin which the said articlesare manufac t-ured is essentially composed of puregum or course; we addto this mass the substances required' for vulcanization, such as, forinstance, sulphur, together with the usual accelerators.

15 The material is worked the following I Y We mix gently the'cork andthe enie'ry with the rubber by stirring the'latter in a mixer whileadding the cork and, emery insmall geneous, we put m'ithe'siilphur andthe acce'lerators and-11%;? triturate to efieet their incorporation;

of a molded and vulcanized tly, we place the mass in tures.

it-uwhile con- I lmeermnmimnuuumximhadmc.

final form of the article so manufactured will naturally'be inaccordance with the nature the form of the mold employed.

we reserve the right to proportiorrin any way the componentsconstituting the mass to be molded, the following formula given heremerely as an indication: S Kilogram.

' We claim as' our invention: f

' A new article of manufacture consist ing of a-molded and vulcanizedmixture of 40 rubber, powdered cork, emery and a vulca'nizinfi agent. I

2. A new article of inanuf aclaire coiiais ting L V Of ber, powderedcorkand emery in the propertion of'20 kilograms of rubber 102.5 kilo gramsof cork and 3 ki1ogram8ofemery, 1

sulphur. r i .t

lnftestimony whereof: we i "RAOUL emomsmsom

